2nd 2.5'' SATA HDD SSD Hard Drive Disk DVD CD ROM Optical SuperDrive Caddy Tray Adapter for Apple Unibody MacBook/MacBook Pro 13 15 17 Early mid Late 2008 2009 2010 2011 2012.etc : Electronics
This old baby working fine still!!! (Early 2011 17inch MacBook Pro upgraded to 16GB Ram and 1TB SSD) : r/macbook
Apple MacBook Pro 17 inch (Early 2011) - Intel Core i7 - Catawiki
Replace SSD cable of MacBook Pro 13 inch late 2011
The next-gen MacBook Pro with Retina Display: SSD Analysis